/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.pigpen.editor.model;

public class Link extends PropertyAwareObject {
    private Operator source;
    private Operator target;

    public Link() {

    }

    public Link(Operator source, Operator target) {
        this.source = source;
        this.target = target;

        source.addOutput(this);
        target.addInput(this);
    }

    public void remove() {
        if (source != null)
            source.removeOutput(this);
        if (target != null)
            target.removeInput(this);
    }

    public Operator getSource() {
        return source;
    }

    public Operator getTarget() {
        return target;
    }

    public String toString() {
        return "Link: " + source + " -> " + target;
    }
}
